Plain weave
Also searched as: tabby, taffeta weave, linen weave, 1/1 weave, calico weave, basket weave, hopsack, rib weave
Plain weave is the simplest interlacing, in which each weft passes alternately over one warp end and under the next, reversing on every pick.
In detail
The repeat is only two ends by two picks, and every yarn changes sides at every opportunity. This gives the highest possible number of interlacings, a firm structure and identical faces. Variations keep the alternating principle but group yarns: a basket or hopsack weave moves two or more yarns together, and a rib weave uses a heavier or doubled yarn in one direction. Poplin, percale, voile, chiffon and taffeta are all plain weaves differing mainly in yarn and density.
The science and numbers
In weave notation plain weave is written 1/1: one up, one down. With one interlacing per yarn crossing, floats are as short as possible, so yarns are gripped tightly and crimp is high. High crimp increases extensibility along the yarn direction under low load and affects shrinkage behavior. Because yarns cannot slide together, tear load is shared by fewer yarns at the tear tip, so plain weaves tend to show lower tear strength than twills of similar specification. Experimental comparisons of 1/1 plain, 2/2 twill and 8-end satin fabrics woven from the same yarns report significant differences in stiffness and tensile behavior, with float length identified as a controlling factor.
A practical example
Hold a plain-woven cotton poplin and a twill chino up to light. The poplin shows a regular grid with no diagonal line, and both faces look nearly identical. Cut a small square and pull out a few yarns from each: the poplin's yarns show a tight, even crimp because they bend around a crossing yarn at every intersection, while the twill's yarns have longer straight runs.
What to distinguish
Plain weave describes interlacing only. It says nothing about fiber, yarn count, thread count or weight: sheer voile and heavy canvas are both plain weaves. A plain weave is not automatically durable or breathable, and its frequent interlacings can make it stiffer and more prone to tearing than a looser twill of similar weight.
Origins and history
Plain weave needs only two alternating sheds, so it can be produced on the simplest looms with two groups of heddles. That mechanical simplicity explains why it underlies many unrelated weaving traditions and why so many fabric names, from calico to taffeta, are plain weaves distinguished by fiber and finish. The alternative name tabby is used particularly in handweaving and textile history.
Related terms
Sources & further reading
- CottonWorks: Weaving basics
- Heliyon: Effect of cotton-Tencel siro yarn twist multipliers on stiffness of plain, twill and satin fabrics (Afroz et al., 2022)
- Heliyon: Mechanical properties of woven fabrics from 50/50 cotton-Tencel siro yarn (Afroz and Islam, 2021)
Technical references reviewed 2026-09-22. Examples are illustrative. Industry organizations and manufacturers describe their own fields; their references are not independent product endorsements. Figures are approximate and depend on the stated test conditions.